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Harry Ferguson Tractors Discussion Forum
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TO30 yoke shaft assy

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Chris Crawford

07-04-2005 17:08:09




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I've been having problems with my bush hog. Its mounting pins are too low, and so when the bush hog is lifted too high, the drive shaft rubs against the forward edge of the bush hog case, wearing both parts. Eventually I'll get a hole in one or both. I try keeping the thing precisely adjusted but it's almost impossible to avoid some sort of disaster during a typical outing.

What I'd like to do is somehow limit the travel of the bush hog so that it can't go too high. One simple solution would be to replace the current 21" yoke and shaft assembly with a 25" yoke and shaft assembly. First, let me explain what I mean by "yoke and shaft assembly", because in prowling the net I have come up with all sorts of terminology.

At the top we have the hydraulic lift fork, the heavy part that is driven to rotate through maybe 45 degrees to lift things. At the bottom we have the actual link arms (some people call them lift arms) that are 32" long and connect to the implement mounting pins with ball joints. Linking these two is what I am calling the "yoke and shaft assembly". The left hand side is a fixed length 21"; the right hand side is a "levelling box assembly" that allows one to tilt or level the implement. That extends out to about 24". What I'd like is to extend them both to 25"; at that length, no collision between drive shaft and casing is possible.

However, it appears that there is no such thing as a 25" "yoke and shaft assembly". In the archives here I found a case of a fellow who appeared to have an extra-long "yoke and shaft assembly" that was causing him the opposite problem. Several people suggested that he drill additional mounting holes in the lift arms, but warned that the steel in those arms is very hard and will require a cobalt bit. I'm reluctant to drill into the lift arms.

So it appears that I have four options:

1. Find some 25" "yoke and shaft assembly" parts.

2. Get some long leveling box assemblies.

3. drill new holes on the lift arms

4. Use the ZANE THANG level-setter device.

Any recommendations on the best course of action?

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Chris Crawford

07-06-2005 08:37:22




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
Thanks for all the ideas, guys. I have come up with another idea that might be cheap and quick: attach some steel plates that allow me to move the mounting pins on the bush hog upwards by about ten inches. That, however, runs afoul of another problem: when the lift arms are all the way up, the bush hog is pulled too close to the tractor and its forward edge rubs against the tires.

Perhaps a simple measurement check might clear this up. My lift arms at top position are at an angle of +40 degrees to the ground, and the ball joints are 35 inches above the ground. At bottom position, they are at about -15 degrees to the ground and the ball joints are 8 inches above the ground. Are these measurements similar to yours? If not, it might indicate that I have an altered lift mechanism.

Chris

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Gene Stevens

07-05-2005 20:09:41




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
I have the same problem after adding the ORC to the PTO conversion adapter. I watch very close when it needs to be lifted but still have it make contact from time to time.



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WBinPA

07-05-2005 17:06:44




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
DunerWi has an idea that may work for you. I bought a Ford 841 which had drop yokes made to carry the lift arms lower. some small pipe welded to flat stock was used. Also, I have a Zane thang that I never installed and don't need. Email if interested.



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Duner Wi

07-05-2005 09:42:01




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
You already have good advice but here is another plan that may work. Just ad to the lift link. 3 pieces of flat strap for each side and can all be bolted together if you wish. One piece would fit where the current lift arm is and the other 2 would sandwich over the lift arm. If you left the center piece long enough at the upper portion you could notch it to index the lift link. I have not done this so am just guessing it might work.

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John (UK)

07-05-2005 06:01:28




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
I can't understand why you should need to do this as others don't seem to complain about it, maybe they do have the problem and just haven't said anything, who knows. The "yoke and shaft you refer to is called a lift rod, the two bars that the implement fastens to are called lower lift links. Regarding drilling them, as you have been told they are very hard, but you can buy them already drilled with extra holes but I would think that if you go this way and as the Bush hog is quite heavy you will find that the tractor will not lift it as you have changed the leverage on the rear linkage. Possibly the best way to go is with the Zane thang as that is easy to fit and will do exactly what you require with the minimum of fuss. Have you got the top link set to the standard length of 25" if it is longer it will keep the rear of the mower low to the ground and cause the problem you have, the back of the mower needs to be fairly high for the PTO shaft to clear the front.

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ZANE

07-05-2005 05:43:30




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 Re: TO30 yoke shaft assy in reply to Chris Crawford, 07-04-2005 17:08:09  
If you should decide to use Paypal I can ship tomorrow. All you have to do is go to Paypal.com and join if you don�t already belong. It requires using your major credit card to join and if you don�t have money in Paypal account it will be charged to your credit card.

My email address is � [email protected]

A money order will be fine. Just takes longer to get to me.

The price is $90.00 including shipping

Price outside the USA is $107.50 including shipping

August 28, 1999 By Zane Sherman 2824 Renfroe Road Talladega Al. 35160 I DO ACCEPT PAYPAL

Position control for the hydraulic lift on the 9N/2N Ford tractor and the TO, TE, TEA Etc, Ferguson tractors.
The 9N/2N came with constant draft hydraulics and at the time this was the state of the art in tractor hydraulics. This feature however did not incorporate position or height control of the implements.

My device the ZANE THANG gives the Ferguson system this feature without any change to the original equipment on the tractor.
I noticed that you have a tractor with the Ferguson lift system �Ferguson system� which does not incorporate the option of POSITION CONTROL. I have invented an add on device that will give position control with no modification of the original lift or any component of the tractor and thought that you might be interested in seeing the particulars. It is mounted on the exterior of the tractor and does not require going inside the lift at all.


Ask some of the guys on the N board on Yesterday�s tractors or look back to the end of August or the middle of Sept. About the �ZANE THANG� Position control for the 9N 2N and TO Ferguson. All these tractors have what is commonly known as the Ferguson system.

INSTALLATION OF THE POSITION CONTROL

The ZANE THANG device comes with assembly instructions and pictures strictly for the purpose of instruction for installation and are not to be reproduced or published. All printed material furnished is copyrighted. I do not furnish pictures of the device except for instructional purposes. Everyone has been gracious enough to honor my wishes as of today. That should tell you something about people who own Ford tractors! :O)

Nothing has to be altered to install the attachment to allow you to have position control on the 9N 2N or TO 20 etc. It bolts onto the outside onto the existing components. It takes only minutes to install with a few common hand tools. It will hold a boom pole, bush hog or any other implement in the position where you put it and will not drift either up or down until you move the control handle just as you normally would if it were an 8N with Henry�s position control.

The original control handle is used to operate the lift from the seat just as it is from the factory. The only difference being that now you will be able to control the height or position of the implement positively.

The draft control will still be effective with the attachment installed. Just set the stop block supplied and it will return to the set depth you are wanting to plow. I have one on my TO 20 and I just get excited every time I go out to use the tractor now. I have had this old girl for 34 years and always had to have chains and bars etc. to use my hay rake or draw bar when pulling the trailer etc. Now all I have to do is move the original touch control handle up or down just as you would on an 8N and put the lift where you want it and it stays there.
This option is especially nice when using a bush hog, a snow plow, a box blade, an angle blade, post hole digger or any other implement that requires infinite height control of the lift arms.

You take your hand off the control handle and the lift stays where it is put as long as the engine and pump is running. There is no interference with the draft control. It will work just the same as before. However the quadrant stop for the draft control depth adjustment that is attached to the slot in the quadrant must be removed as it is no longer needed for draft as it will work with the setting of the device.

SHIPPING

I am now shipping my position control attachment designed for the 9/2N Ford and the TO 20 Ferguson tractors etc.

The price is $90.00 in the USA. This includes the shipping. Shipping outside the US is extra and the price is $ 107.50 US dollars. And also includes the shipping costs.

Just send a money order or a personal check and let me know when and where you want it shipped. I will wait till the check clears the bank before I ship. I will ship the money order the next working day.
If you are not satisfied just ship it back to me in good working order and I will refund your money less the shipping charges.

The device is completely guaranteed to do what I say it will and to your satisfaction or I will return your money less the shipping charges plus five dollars for handling if returned with in 30 days of the sale when I receive the unit back in good condition.

Over 500 units sold all over the English speaking world with lots of positive feedback.
See my other devices for the N Ford tractors at >Link

My>Link address is

Zane Sherman
2824 Renfroe Road
Talladega Al. 35160.
Phone 256 268 2327

Email [email protected]

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